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Substitution of reduced iron by zinc in total soil nitrogen estimation by modified Olsen's method

Published online by Cambridge University Press:  27 March 2009

Praveen-Kumar  and
R. K. Aggarwal
Praveen-Kumar
Affiliation:
Division of Soil-Water-Plant Relationship, Central Arid Zone Research Institute, Jodhpur 342 003, India
R. K. Aggarwal
Affiliation:
Division of Soil-Water-Plant Relationship, Central Arid Zone Research Institute, Jodhpur 342 003, India
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Extract

The conventional Kjeldahl method which is usually employed for determination of total N in soil does not effect quantitative recovery of NO2- or NO3- (Bremner, 1965). Therefore, various modifications have been suggested (Cope, 1916; Davisson & Parson, 1919). Bremner (1965) observed that the quantitative recovery of NO2- and NO3- by any method, other than the modified Olsen's method (Bremner & Shaw, 1958), is not certain.

Type
Short Notes
Information
The Journal of Agricultural Science , Volume 108 , Issue 3 , June 1987 , pp. 681 - 682
Copyright
Copyright © Cambridge University Press 1987

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References

Bremner, J. M. (1965). Total nitrogen. In Methods of Soil Analysis Pt 2 (ed. Black, C. A. et al. ), pp. 1149–1178. Madison, Wisconsin: American Society of Agronomy.Google Scholar
Bremner, J. M. & Shaw, K. (1958). Denitrification in soil: methods of investigation. Journal of Agricultural Science, Cambridge 51, 22–39.CrossRefGoogle Scholar
Cope, W. C. (1916). Kjeldahl modification for determination of nitrogen in nitro substitution compounds. Journal of Industrial Engineering and Chemistry 9, 592–593.CrossRefGoogle Scholar
Davisson, B. S. & Parsons, J. T. (1919). The determination of total nitrogen including nitric nitrogen. Journal of Industrial Engineering and Chemistry 11, 306–311.CrossRefGoogle Scholar